C.31.RSA:4.2 - Explanatory slot labels
A local accounting description may use explanatory slot labels such as:
S_function
S_flow
S_control
S_type
S_interface
S_scale
S_work
S_evidence
S_changePolicy
S_unique
S_crossScopeUnique
H_residual
These labels are local slots, not FPF ontology. H_residual is residual uncertainty or unmodelled variance under the accounting basis. Its value is not automatically commensurable with counts or other measures of interface grammars, work templates, evidence packages, or regulatory arguments.